Andesitic rocks have mineral compositions between those of and basaltic rocks.
a.
conglomerate
c.
granitic
b.
metamorphic
d.
organic

The correct answer is option C, granitic

Explanation:

Granite are intrusive rocks which consists of mainly quartz and fledspar along with other minerals in minute quantity. The basaltic rock is comprised of pyroxene minerals. These are extrusive rocks. While Andesitic rock is fine grained and intrusive igneous rocks like the granite and they also have ferromagnetic material like pyroxene similar to the basaltic rock. Thus it is said that  Andesitic rocks have mineral compositions between those of  granitic and basaltic rocks.

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

the correct choice is a .

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